52 HATCH EXPERIMENT STATION. [Jan. 



Manure Alone v. Manure and Potash. 



An experiment in continued corn culture for the com- 

 parison of an average application of manure with a smaller 

 application of manure used in connection with muriate of 

 potash was begun in 1890. A full account will be found in 

 the annual reports of 1890-95, and in the latter year a 

 general summary of the results is given. 



The land used in this experiment was seeded with a mix- 

 ture of timothy, red-top and clover in the standing corn 

 of 1896. A good stand of grass and clover was secured, 

 although the latter was rather unevenly developed in different 

 parts of the field, suggesting a possible lack of thoroughness 

 in mixing the seeds. 



No manure or potash was used in 1897. The field in- 

 cludes four plots, of one-fourth an acre each. The average 

 results for 1897 are shown below : — 



Plots 1 and 3 (manure alone, 6 cords per acre, 1890-96) : hay, 

 1,403|^ pounds ; rowen, 784 pounds. 



Plots 2 and 4 (manure, 3 cords per acre, 1890-92 ; 4 cords, 

 1893-96 ; and potash, 160 pounds per acre) : hay, 961^ pounds ; 

 rowen, 536| pounds. 



This field was continued in grass and clover during the 

 present season, but manure and potash were applied as 

 shown below : — 



Plot 1, manure, 1 cord; weight, 5,087.5 pounds, 

 p, , f^ I manure, .5 cord; weight, 2,712.5 pounds. 



' 1 muriate of potash ; weight, 40 pounds. 

 Plot 3, manure, 1 cord; weight, 5,372.5 pounds, 

 p, , , f manure, .5 cord; weight, 2,855 pounds. 



' 1 muriate of potash ; weight, 40 pounds. 



The manure applied to each plot was sampled and analyzed, 

 and from the analyses the amounts of the three most essential 

 elements of plant food applied per acre were calculated, with 

 results shown below : — 



